| olor at low pH | Transition pH range (approximate) | Color at high pH | | a href="/encyclopedia/Methyl-violet" title="Methyl violet">Methyl violet | blue-violet | 0.0-1.6 | yellow |
| a href="/encyclopedia/Thymol-blue" title="Thymol blue">Thymol blue (first transition) | red | 1.2-2.8 | yellow |
| a href="/encyclopedia/Methyl-yellow" title="Methyl yellow">Methyl yellow | red | 2.9-4.0 | yellow |
| a href="/encyclopedia/Bromophenol-blue" title="Bromophenol blue">Bromophenol blue | yellow | 3.0-4.6 | violet |
| a href="/encyclopedia/Congo-red" title="Congo red">Congo red | blue | 3.0-5.2 | red |
| a href="/encyclopedia/Methyl-orange" title="Methyl orange">Methyl orange | red | 3.1-4.4 | yellow |
| a href="/encyclopedia/Litmus-test" title="Litmus test">Litmus | red | 4.5-8.3 | blue |
| a href="/encyclopedia/Bromocresol-purple" title="Bromocresol purple">Bromocresol purple | yellow | 5.2-6.8 | violet |
| a href="/encyclopedia/Bromothymol-blue" title="Bromothymol blue">Bromothymol blue | yellow | 6.0-7.6 | blue |
| a href="/encyclopedia/Phenol-red" title="Phenol red">Phenol red | yellow | 6.6-8.0 | red |
| hymol blue (second transition) | yellow | 8.0-9.6 | blue |
| a href="/encyclopedia/Phenolphthalein" title="Phenolphthalein">Phenolphthalein | colorless | 8.2-10.0 | pink |
| a href="/encyclopedia/Thymolphthalein" title="Thymolphthalein">Thymolphthalein | colorless | 9.4-10.6 | blue |
| a href="/encyclopedia/Alizarin-Yellow-R" title="Alizarin Yellow R">Alizarin Yellow R | yellow | 10.1-12.0 | red |